Android通过HttpURLConnection和HttpClient接口实现网络编程

URL url = new URL("http://www.xxx.com/index.jsp?type=231");
HttpURLConnection urlConn=(HttpURLConnection)url.openConnection();

//设置输入和输出流
urlConn.setDoOutput(true);
urlConn.setDoInput(true);
//设置请求方式为POST
urlConn.setRequestMethod("POST");
//POST请求不能使用缓
urlConn.setUseCaches(false);
urlConn.disConnection();

HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
InputStreamReader in = new InputStreamReader(urlConn.getInputStream());
BufferedReader buffer = new BufferedReader(in);
String inputLine = null;
while (((inputLine = buffer.readLine()) != null)) {
    resultData += inputLine + "\n";
}
in.close();
urlConn.disconnect();

String httpUrl = "http://www.xxx.com/getUser.jsp";
String resultData = "";
URL url = null;
try {
    url = new URL(httpUrl);
} catch (MalformedURLException e) {
    Log.e(DEBUG_TAG, "MalformedURLException");
}
if (url != null) { 
    try {
        HttpURLConnection urlConn = (HttpURLConnection) url.openConnection(); 
        //因为这个是post请求,设立需要设置为true 
        urlConn.setDoOutput(true); 
        urlConn.setDoInput(true);
        urlConn.setRequestMethod("POST"); // 设置以POST方式  
        urlConn.setUseCaches(false); 
        urlConn.setInstanceFollowRedirects(true);
        urlConn.setRequestProperty("Content-Type","application/x-www-form-urlencoded"); 
        // 这些配置必须要在connect之前完成， 
        // 要注意的是connection.getOutputStream会隐含的进行connect。 
        urlConn.connect(); 
        
        // DataOutputStream流
        DataOutputStream out = new DataOutputStream(urlConn.getOutputStream());
        String content = "name=" + URLEncoder.encode("张三", "GB2312");   
        out.writeBytes(content);  
        out.flush();
        out.close();
    } catch(Exception e) {
        //
    }
}

String httpUrl = "http://www.xxx.com/getUser.jsp?par=123"; 
// HttpGet连接对象 
HttpGet httpRequest = new HttpGet(httpUrl);  
HttpClient httpclient = new DefaultHttpClient(); 
HttpResponse httpResponse = httpclient.execute(httpRequest); 
// 请求成功 
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { 
    // 取得返回的字符串 
    String strResult = EntityUtils.toString(httpResponse.getEntity()); 
    mTextView.setText(strResult); 
} else { 
    mTextView.setText("请求错误!"); 
}

String httpUrl = "http://www.xxx.com/getUser.jsp";   
HttpPost httpRequest = new HttpPost(httpUrl);
List<NameValuePair> params = new ArrayList<NameValuePair>();   
params.add(new BasicNameValuePair("userId", "123")); 
HttpEntity httpentity = new UrlEncodedFormEntity(params, "GB2312"); //设置字符集
httpRequest.setEntity(httpentity);
//取得默认的HttpClient 
HttpClient httpclient = new DefaultHttpClient(); 
//取得HttpResponse 
HttpResponse httpResponse = httpclient.execute(httpRequest); 
//HttpStatus.SC_OK表示连接成功 
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { 
    // 取得返回的字符串 
    String strResult = EntityUtils.toString(httpResponse.getEntity()); 
    mTextView.setText(strResult); 
} else { 
    mTextView.setText("请求错误!"); 
}